In the process of restoring it for an upcoming exhibition, the MFA made a surprising discovery. In the Renaissance equivalent of a cut-and-paste job, it appears that Tintoretto changed his mind about the subject, cut the original canvas to rearrange the pieces he didn't like, then - perhaps two decades later - painted over parts of the result to come up with an entirely new composition.
The painting that is now a horizontal nativity was once a vertical crucifixion.
It's a Christmas miracle.
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